/ Dictionary / Index M massy: Meaning and Definition of Find definitions for: mass•y Pronunciation: (mas'ē), [key] — mass•i•er, mass•i•est. massive. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mass wasting Massys Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language